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Those Potter kids are adorable, what with their charming English accents and all. But Josh Horowitz of MTV threw down the gauntlet, challenging the cast of proper Brits to speak like ‘Mericans!

Check out their valiant efforts below.

Harry Potter and the Deathly Hallows: Part 1 hits theaters Friday – but come on, you knew that.

Who do you think nailed the US dialect the best? What other phrase should Josh have thrown at them?

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